package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Slf4j
@Service
public class DishServiceImpl implements DishService {

    @Autowired
    DishMapper dishMapper;

    @Autowired
    DishFlavorMapper dishFlavorMapper;

    @Autowired
    SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品及口味
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品表插入一条数据
        dishMapper.insert(dish);

        Long dishId = dish.getId();

        //向菜品表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {

            for (DishFlavor f : flavors) {
                f.setDishId(dishId);
            }

            dishFlavorMapper.insertBatch(flavors);

        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);

        List<DishVO> dishes = page.getResult();

        long total = page.getTotal();

        return new PageResult(total, dishes);
    }

    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除-----是否起售?
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);

            if (dish.getStatus() == StatusConstant.ENABLE){

                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);

            }        }
        //是否被套餐关联

        List<Long> setmaelIds = setmealDishMapper.getSetmealIdsByDishIds(ids);

        if (setmaelIds != null && setmaelIds.size() > 0) {

            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);

        }

        //删除菜品数据
//        for (Long id : ids) {
//
//            dishMapper.deleteById(id);
//
//        }
        //删除菜品关联的口味数据
//        for (Long id : ids) {
//
//            dishFlavorMapper.deleteByDishId(id);
//
//        }
        dishMapper.deleteIds(ids);

        dishFlavorMapper.deleteByDishIds(ids);

    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {

        DishVO dishVO = new DishVO();

        Dish dish = dishMapper.getById(id);
        BeanUtils.copyProperties(dish, dishVO);

        List<DishFlavor> dishFlavors = dishMapper.getFlavorsById(id);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 修改菜品及口味
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.update(dish);

        dishFlavorMapper.deleteByDishId(dish.getId());

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {

            for (DishFlavor f : flavors) {
                f.setDishId(dish.getId());
            }

            dishFlavorMapper.insertBatch(flavors);

        }
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = new Dish();
        dish.setId(id);
        dish.setStatus(status);

        if (status != null && id !=null) {
            dishMapper.update(dish);
        }
    }
}
